Simple Machines Quiz
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Questions and Answers

Why do humans create devices to lift and move things?

  • To use more effort
  • To reduce friction
  • To use less effort or create a greater force (correct)
  • To create less force

    • What is friction?

  • The speed of an object
  • The resistance between surfaces that come in contact with each other (correct)
  • The force needed to move a device
  • The energy stored in devices

    • How can friction be reduced between surfaces?

  • By making moving parts loose
  • By increasing the amount of surface the parts touch
  • By using bumpy or fuzzy surfaces
  • By using smooth and hard surfaces (correct)

    • What creates the force needed to move a device?

    <p>Simple forces</p> Signup and view all the answers

    Why do devices use parts to store and use energy?

    <p>To store energy and use (consume) energy</p> Signup and view all the answers

    What happens when a compressed spring in a winding mechanism is released?

    <p>It sets things in motion</p> Signup and view all the answers

    What is the purpose of simple machines in devices?

    <p>To create a greater force with less effort</p> Signup and view all the answers

    What is the role of moving air and water in devices?

    <p>To assist in moving parts of mechanisms</p> Signup and view all the answers

    How does reducing friction help in making parts move better?

    <p>By decreasing the amount of surface the parts touch</p> Signup and view all the answers

    Why do loose moving parts have an advantage over tight moving parts?

    <p>Loose parts have less friction than tight parts</p> Signup and view all the answers

    What is the purpose of winding mechanisms in devices?

    <p>To store energy in a compressed spring</p> Signup and view all the answers

    Why do designers use a variety of simple machines in devices?

    <p>To solve different problems effectively</p> Signup and view all the answers

    What happens when an object moves down a slope?

    <p>It picks up speed due to gravity</p> Signup and view all the answers

    How does using smooth and hard surfaces reduce friction?

    <p>By decreasing the amount of surface the parts touch.</p> Signup and view all the answers

    Why do devices need a force to move?

    <p>To set things in motion.</p> Signup and view all the answers

    What is the primary reason why humans create devices to lift and move things?

    <p>To create a greater force</p> Signup and view all the answers

    How does reducing friction help in making parts move better?

    <p>By decreasing the amount of surface parts touch</p> Signup and view all the answers

    What is the effect of an object moving down a slope?

    <p>It picks up speed</p> Signup and view all the answers

    How do winding mechanisms in devices work?

    <p>By using compressed springs to cause movement</p> Signup and view all the answers

    How can moving air and water contribute to moving parts of mechanisms?

    <p>By aiding movement</p> Signup and view all the answers

    What happens when an object moves down a slope, and friction is reduced?

    <p>It speeds up the object</p> Signup and view all the answers

    Why do loose moving parts have an advantage over tight moving parts?

    <p>Loose parts move more easily</p> Signup and view all the answers

    What is the main purpose of using smooth and hard surfaces instead of bumpy surfaces to reduce friction?

    <p>To decrease the amount of surface the parts touch and cause friction</p> Signup and view all the answers

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